Recent studies have confirmed that the Chekka Formation (Senonian, Late Cretaceous), which consists of organic-rich mudstone and is well exposed in southern Lebanon (Hasbaya), includes two types of asphalt: the first one is related to in situ maturation of organic matter in the rock matrix, and the ...

... the hill separating Wadi Khaled and Wadi Nahr al-Assi, passi ng the villages of Maissra, Harba'ata, Hit, Abech, Fissan, to the altitude of the villages of Brina and Mitirba, to the north-east and south-east borders of the Caza of North Baalbek and the borders of the cazas of Baalbek, Bekaa, Hasbaya ...